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Routines |
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This handles the hero using the shovel to clear the blockage in tunnel room number 50.
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| action_shovel | B3F6 | LD A,($68A0) | If the global current room index isn't room_50_BLOCKED_TUNNEL bail out | |
| B3F9 | CP $32 | |||
| B3FB | RET NZ | |||
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Bomb out if the blockage is already removed.
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| B3FC | LD A,($7077) | Fetch the room definition's first boundary byte | ||
| B3FF | CP $FF | Is it 255? | ||
| B401 | RET Z | Return if so - the blockage was already removed | ||
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Otherwise we can remove the blockage
(Note that the hero doesn't need to be adjacent to the blockage for this to work, only in the same room).
The blockage boundary's x0 is set to 255. This invalidates the boundary by forcing the "x < bounds->x0" test at B2D9 (in interior_bounds_check) to fail.
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| B402 | LD A,$FF | roomdef_50_blocked_tunnel_boundary[0] = 255 | ||
| B404 | LD ($7077),A | |||
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Remove the blockage graphic.
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| B407 | INC A | roomdef_50_blocked_tunnel_collapsed_tunnel = 0 | ||
| B408 | LD ($708C),A | |||
| B40B | CALL setup_room | Setup the room | ||
| B40E | CALL choose_game_window_attributes | Choose game window attributes | ||
| B411 | CALL plot_interior_tiles | Render visible tiles array into the screen buffer | ||
| B414 | JP increase_morale_by_10_score_by_50 | Increase morale by 10, score by 50 and exit via | ||
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